// ml278
// Copyright (C) 2008 Bjørn Øivind Bjørnsen, Aleksander Gjermundsen, Knut Andre Tidemann, Thomas Hansen
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

//
// Global variable definitions
//

uniform sampler2D Texture0;
uniform float fExposure;

//
// Function declarations
//

vec4 ps_main( in vec4 fvRayleighColor, in vec4 fvMieColor, in vec2 Texcoord );

//
// Function definitions
//

vec4 ps_main( in vec4 fvRayleighColor, in vec4 fvMieColor, in vec2 Texcoord ) {
    vec4 fvDiffuse;

    fvDiffuse = texture2D( Texture0, Texcoord);
    return (1.00000 - exp( (( -fExposure ) * (fvRayleighColor + (fvDiffuse * fvMieColor))) ));
}


//
// Translator's entry point
//
void main() {
    vec4 xlat_retVal;

    xlat_retVal = ps_main( vec4(gl_TexCoord[0]), vec4(gl_TexCoord[1]), vec2(gl_TexCoord[2]));

    gl_FragData[0] = vec4( xlat_retVal);
}


